Balancer is an automated portfolio manager, liquidity provider, and price sensor.

Balancer turns the concept of an index fund on its head: instead of paying fees to portfolio managers to rebalance your portfolio, you collect fees from traders, who rebalance your portfolio by following arbitrage opportunities.

Balancer is based on an N-dimensional invariant surface which is a generalization of the constant product formula described by Vitalik Buterin and proven viable by the popular Uniswap dapp.

Two categories of users can benefit from the Balancer Protocol: liquidity providers - who own Balancer Pools or participate in shared pools, and traders - who buy or sell the underlying pool assets on the open market.

Anyone can be a liquidity provider. For example:

Traders can choose from a diverse set of pools, each presenting a unique set of investment opportunities and challenges through its particular configuration of tokens, weights, and fees. The interplay between these settings, pool volume, and external prices generates market forces that incentivize traders to maintain stable token ratios, thereby preserving asset value for liquidity providers.

There are three main categories:


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